
function greet(){
    console.log("hello there")
}

const speak =function(){
    console.log("good day!")
}

greet()
speak()

let email ="1902737852@qq.com"
let result = email.replace("google","baidu")
console.log(result);

const calcArea =function(radius){
    return 3.14 * radius ** 2
}
const area = calcArea(5)
console.log(area)
